Marking device.



E. T. McPHERSON.

MARKING DEVICE.

APPLICATION FILED MAY 19. I916.

Patented Dec. 5, 1916.

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UNITED TATES PATENT OFFICE.

ELMER T. McPI-IERSON, or WILMINGTON, onro, ASSIGNOR ro THE IRWIN AUGERBi'r COMPANY, or WILMING'roN, OHIO, A CORPORATION or OHIO.

MARKING DEVICE.

Specification of Letters Patent.

Patented Dec. '5, 1916.

0rigina1 application filed May 20, 1915,seria1No. 29,284. Divided andthis application filed. May 19, 1916. Serial No. 98,521.

T 0 all whom it may concern Be it known that I, ELMER T. MoPi-rnn- SON,a citizen of the United States, residing at IVilmington, in the countyof Clinton and State of Ohio, have invented certain new and usefulImprovements in Marking Devices, of which the following is aspecification, reference being had therein to the accompanying drawing.

This invention relates to a marking device used in connection with diesfor forming the shanks of boring tools.

In a co-pending application filed by me May 20th, 1915, Ser. No. 29,28on which Letters Patent 1,18%,111 were granted May 23rd, 1916, oneembodiment of a marking device was shown and described and the presentapplication constitutes a division of the first-mentioned application.

The object of the invention is to provide an efficient and quicklyoperable marking device which is adapted for'use in connection withdies.

In the accompanying drawings, Figure 1 is a top plan view of a lower oranvil die showing the position of the marking device thereon; Fig. 2 isa transverse sectional view showing the marking device.

In order to show the application of the marking device to the die I haveherein illustrated a lower die 1 and an upper die 2. As shown in Fig. 2at 3 I have illustrated a shank showing the position thereof withrelation to the marking device when the mark is to be applied. The diesherein shown are the same as were shown and described in the abovementioned co-pending application, but only so much thereof have beenillustrated as is necessary for the purposes of this application. It isto be understood, however, that the marking device is applicable to diesof different natures and different kinds. These dies, however, compriseangular recesses 4 and curved recesses 5 which cooperate to form theroughed out portions of the tool. The angular recess is preferablyV-shaped, as shown, and the end is closed by means of a stop 6 which wasmore fully described in the other application. Those ends of thecooperating portions of the die opposite the stop are enlarged, as shownat 7 to receive and permit the rotation of the uniformed portion of theblank. n order to finish theround. h

provided the recesses 8 and 9 arranged centrally upon the die for thepurposes fully described in the co-pending application. Adjacent oneside of the dies and extending inwardly from the sides thereof I haveprovided fiat portions 10. The final operation is imparted to the shankof the boring tool in this portion of the die. To insure that severalshanks will be of uniform character as to length and size I haveprovided the portions 10 with a stop 11 so that the shanks will belocated in the sameposition upon this portion of the dies, therebyinsuring that the impact will be of a uniform nature and of the sameextent when operating upon any of several shanks. The end opposite thestop 11 is provided with a rest 12.

After the finishing of the round and shank of the bit or boring tool itis customary to place upon the shank a mark, such as a numher, toindicate the size or number of the bit. This is usually done by means ofa marking tool and by hand. In the present instance, however, I haveprovided one die with a marking device which is supported adjacent tothe flat portions 10 in order that the shank which is being operatedupon can be easily placed beneath the marking device by sliding it toone side, as shown in Fig. 2, after the same has been finished in thefinishing portions 10 of the die. As here shown, this marking devicecomprises a resilient bar or finger 13 mounted at the side and having asubstantially horizontal portion 14 extending into the space formedbetween the dies at that side and above the lateral portion of the part10 of the lower die. This finger is so arranged that the finished shankof the bit can be slipped beneath the same and on the next blow of thehammer the upper die will strike the finger and place the mark on theshank of the bit, it being understood of course that the lower side ofthe finger is provided with a type face 15 of such a kind as to make thedesired mark. The upper die is cut away along its outer edge, as shownat 16, to accommodate the marking finger and to prevent the same frombeing driven too far into the metal when the shank of the bit is placedbeneath the same. This resilient finger may be mounted in any suitablemanner. It is, however, preferably made separate from the die o th t tcan e chan d and n w w her given the die when it is recut, as wasexplained in my said co-pending application. In the present instance theresilient finger has a vertical portion or shank 17 by means of which itis held in position along the side of the lower die 1, this beingaccomplished by forming a recess in the liner 18, by means of which thedie is secured in position, and inserting the upright or shank of themarking finger in this recess.

While the marking device in this case has been shown in connection witha die of the nature shown and described in the co-pending applicationabove mentioned, it is to be understood that the marking device can beused in dies of different kinds and that the specific features thereofcan be varied, as I do not desire to be limited to what is actuallyshown and described except as specified in the claims or the state ofthe art requires.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is

1. In a device of the character described,

an anvilldie, a resilient bar having a vertical portion fixed at oneside of said anvil die, and an intermediate portion looped with the endthereof extending horizontally over the die, a marker on said end, and ahammer die.

2. In a device of the character described,

a hammer die and an anvil die, a recess in the hammer die extending fromone side thereof inwardly, a resilient bar mounted at said side of theanvil die and having an end projecting into said recess, and a marker onsaid end.

3. In a device for forging auger bits, a lower die and an upper die,said dies having portions sunken therein,.extending from one sideinwardly, and a marking device mounted at said side and extending intothe space between said portions.

4. In a device for forging auger bits, a lower die and an upper die,said dies having portions sunken therein extending from one sideinwardly, a resilient marking device mounted at said side and extendinginto the space between said portions and the portion of the upper diebeing recessed to receive the end of said marking device.

5. In a device of the character described,

hammer and anvil dies provided with sunken portions extending from oneside inwardly, a recess in the sunken portion of the hammer dieextending from said side inwardly, a resilient bar mounted at said sideof the anvil die and having its end extending into said recess and amarker on said end projecting outside of the recess.

In testimony whereof, I afiix my signature.

ELMER T. MCPHERSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

